Chevy ? if it is I would think it would have to be a 55 or newer.. Im thinking 54 or 53 is the closed drive shaft late 54 might be first year of the open ,, not positive on that ... if its a Ford they were open
of course I have been wrong 8 or 10 times today so ...............???the DR. will be on here soon ,, he is the man with all the answers ,, he is the go to man on here [P.. and I think if you get a standard floor shifter the arms need to be pointed up if they dont hit nothing or it will be backwords ... thats the way my 49 chevy truck was .. I couldnt flip the arms on the trans because they would hit the floor board .